<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
  <el-header >
    <div>
      <img src="@/assets/image/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主题区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse?'64px':'200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
    <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409BFF"
      :unique-opened="true"
      :collapse="isCollapse"
      :collapse-transition="false"
      :router="true"
      :default-active="activePath"
      >
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id" >
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{ item.authName }}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+ subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+ subItem.path)">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>
<script>
export default {
  name: 'HOmeCode',
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮,切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style scoped lang="less">
.home-container{
  height: 100%;
}
.el-header {
background-color: #2E3436;
display: flex;
justify-content: space-between;
padding-left: 0;
align-items: center;
color: #eee;
font-size: 20px;
>div{
  display: flex;
  align-items: center;
  span{
    padding-left: 15px;
  }
}
}

.el-aside{
background-color: #313743;
.el-menu{
border-right: none;
}
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #414A5A;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
